WWII - General Sir Allen H. S. Adair, UK

I saw the name General Sir Allen Henry Shafto Adair in the book Eye of the Needle, by Ken Follett. He's listed as the commander of the British Guards Armoured Division. He is also on my family tree, listed as Maj-Gen, b.Nov 3, 1897, m.Apr 28, 1919, Enid Violet Ida Ward. My Adair connection is through Jesse Adair, that's all the info I have, he'd be my gt gt gt gt gt gt grandfather. His father is unknown. Conjecture is Robert Adair, d. Jan, 1798. Any info greatly appreciated.Ryan Hickman - BC, Canada